68 OLIVELLA. 



(fig. 86), with two revolving series of maculations, often seen 

 upon immature specimens, 0. myriadina^ Marrat, not Duclos 

 (fig. 8T), 0. miliacea, Marrat (fig. 88), and 0. laetea, Marrat. 



O. MYRIADINA, DucloS. PI. 15, fig. 90. 



Spire prominent, showing six whorls ; pure white. 



Length, 3-4 mill. 



Panama. 



This is the smallest of the Olivellas, yet the number of whorls 

 and form of the shell indicate maturity. Duclos gives no locality, 

 but I venture to identify with his species the unfigured 0. incon. 

 spicua, C. B. Ad., from Panama ; a species which has been mis- 

 understood by Marrat and Kiister — as has also been myriadina. 



O. JASPiDEA, Gmelin. PI. 15, figs. 91-94. 



Yellowish white, closely fasciculated with dark chestnut at the 



sutures, and frequently above the fascicle also ; intermediate 



surface closely reticulated and punctated, fascicle strigated with 



bright chestnut. Length, 12-18 mill. 



West Indies. 



0. piperita, Marr. (figs. 93, 94), is based on water-worn 

 specimens. 



0. TEHUELCHANA, d'Orb. PI. 15, figs. 95-9Y ; PI. 16, fig. 1 ; PI. 1, 



fig. 6. 



Pellucid white, with an opaque zone at the suture. 



Length, 12-15 mill. 



San Bias, Patagonia. 



With this I unite O. bidlula, Reeve (fig. 1), said to be West 

 Indian, and 0. pura, Reeve (fig. 97). 



0. FLORALIA, Duclos. PL 15, fig. 98 ; PI. 16, figs. 99, 100, 2,8. 



Shell narrow, with acuminated spire ; spire yellowish- or 

 chestnut-tipped, body-whorl white, or with nearl}^ obsolete, 

 distant chestnut zigzag markings. Length, 8-10 mill. 



West Indies. 



Distinguished from 0. jaspidea and 0. nivea by its narrow 

 form and elongated spire. It is the 0. oryza of Duclos, not 

 Lamarck, and 0. alba (fia-. 98), and 0. elongata (figs. 99, 100), 

 of Marrat. 



